package collection2;


import object.Point;

import java.util.ArrayList;
import java.util.Collection;

public class Collection1 {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("one");
        c1.add("two");
        c1.add("three");
        c1.add("four");
        c1.add("five");
        System.out.println(c1);
        System.out.println("c1的元素个数是："+c1.size());
        System.out.println("c1是否为空集："+c1.isEmpty());

        c1.clear();
        System.out.println(c1);
        System.out.println(c1.size());
        System.out.println(c1.isEmpty() );



        Collection<Point> c = new ArrayList<>();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        System.out.println(c);

        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含："+contains);

        c.remove(p);
        System.out.println(c);

        Collection cc = new ArrayList();
        Point pp = new Point(1,2);
        cc.add(pp);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        pp.setX(100);
        System.out.println(pp);
        System.out.println(cc);
    }
}
